Quadefy

From Publisher Website:

Quadefy is a fast playing new strategy game played in three dimensions. Easy to learn and quick to play, Quadefy uses visual spatial skills and strategies that will keep you on your toes. When playing Quadefy, you have to think a little bit strategist and a little bit puzzle builder. Players take turns stacking their game pieces on the base, each attempting to keep their entire game piece "in bounds." "In bounds" means that the piece must be completely over the game base and no more than four "cubes" high. The first player to force their opponent to have to play out of bounds, wins. Every move is both offensive and defensive, making Quadefy very fun to play. The rules have been drafted so that there is always a winner, no ties, stalemates, or cat's games. Hand crafted from high quality hardwoods, Quadefy is pretty enough to be left out on the coffee table or bookshelf to be played again and again.